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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

1981 carb choke linkage !

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Old Dec 13, 2016 | 05:15 PM
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1981 carb choke linkage !

Okay took my carb off to rebuild . I put it back togethet but i dont think i did the choke linkage right any ine have a pic of how its supposed to be or can tell how to do it ! Than

ks







 
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Old Dec 13, 2016 | 05:25 PM
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Why do you think it's not correct? To test it, loosen the screws that lock the black round piece, hold the throttle wide open and turn the black piece back and forth. The choke door should open and close.

If the choke door doesn't open and close, pull the black piece completely off, you must not be engaged into the arm inside.
 
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Old Dec 13, 2016 | 05:31 PM
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It just doesnt look right to me . That little bulb on the back does that control the choke plaete and if so how ? I thought one you move the the throttle it controlled the plate . Idk this is my first carb ive pulled and worked with
 
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Old Dec 13, 2016 | 05:37 PM
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The throttle can lock the choke out, that is why you need to hold the throttle open when messing with the choke. The throttle does not control the choke.

The vacuum thing in the back is the choke pull off. Open the throttle wide open and then turn the black piece till the choke just shuts. Then take your finger and pull the linkage back just like the vacuum diaphragm would(the choke pull-off vacuum piece). When you pull it all the way back, the choke door should crack open just a little bit. That's what it does, it pulls the choke door open just a little bit after the engine starts.
 
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Old Dec 13, 2016 | 05:42 PM
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The pics are kinda too close to tell...is it a 2150 ?
 
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Old Dec 13, 2016 | 05:57 PM
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This from Holley but the basic principles are the same.

If a 2150, this may help.
 
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Old Dec 13, 2016 | 06:21 PM
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Awesome man thanks ! Has any done a 4 bbl swap ? How does it effect performance ? Do any other mods need to be done other than intake ?
 
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Old Dec 13, 2016 | 06:39 PM
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Originally Posted by Tartersauce53
Awesome man thanks ! Has any done a 4 bbl swap ? How does it effect performance ? Do any other mods need to be done other than intake ?
A 4bbl swap is one of the best things you can do to wake up these engines. I have never felt much from a camshaft swap, but the 4bbl swap will give you a definite power boost you can feel.

Several things have to be changed, like fuel lines, throttle linkage connections, etc. But it's worth it. Buy one with a manual choke and you do not have to fool with all that stuff you are messing with right now.
 
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Old Dec 13, 2016 | 06:46 PM
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Any certain 4 bbl carb/intake combo you recommend ?
 
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Old Dec 13, 2016 | 06:48 PM
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A four barrel swap will wake up a 302 or 351 in the Windsor Engine Family if...
rear differential gearing accepts what is delivered and can translate to the rubber. Let's not forget the transmission. Engine,Transmission, Differential. The essential mated components of the Drivetrain.
 
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Old Dec 13, 2016 | 06:51 PM
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Well its a 351M with 4 speed granny low 4x4 . Anyone know the stock gear ratio ?
 
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Old Dec 13, 2016 | 06:56 PM
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You'll have to determine your gear ratio here: Certification Label - ???Gary's Garagemahal. But, waking up a 351M isn't all that easy as they were way down on compression. You can try the 4bbl, but don't expect huge gains. However, installing a straight-up timing set will help quite a bit.
 
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Old Dec 13, 2016 | 06:57 PM
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Originally Posted by Tartersauce53
Well its a 351M with 4 speed granny low 4x4 . Anyone know the stock gear ratio ?
What is the code on the sticker on the door?
All of that information can be de-coded here
Certification Label - ???Gary's Garagemahal
Dave ----
 
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Old Dec 13, 2016 | 07:50 PM
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Originally Posted by Gary Lewis
You'll have to determine your gear ratio here: Certification Label - ???Gary's Garagemahal. But, waking up a 351M isn't all that easy as they were way down on compression. You can try the 4bbl, but don't expect huge gains. However, installing a straight-up timing set will help quite a bit.
Ahhh, A 351M....Outside of my scope of practice. I relegate to those with experience
 
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Old Dec 13, 2016 | 08:05 PM
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Okay sweet man
 
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